Process of obtaining pure metallic copper from a solution of a salt of copper.



suitable solution for UNITED sTArEs PATENT orruono LUCIEN JUMAU, or PARIS, FRANCE.

PROCESS OF OBTAINING PURE METALLIC COPPER FROM A SOLUTION OF A SALT OF COPPER.

Specification of Letters Patent.

- Patented Aug. 10, 1909. I

Original application filed January 19, 1907, Serial No. 353,064. Divided and this application filed A'Dril m. Serial No. 428,413.

To all whom it may concern:

Be it known that I, LUCIENYJUMAU, citizen of France, residing at Paris, in the said Republic, have invented new and useful Improvements in Processes for Obtaining Pure Metallic Copper from a Solution'of a Salt of Copper, (for which I have obtained a patent of addition in France, No.- 6,825, bearin date October 27, 1906,) of which the follou iiig is a specification.

My invention relates to an improved process for obtaining pure metallic copper from a solution of a salt of copper, and-it consists in the steps and processes herein described and claimed.

This application'is a division of an application Serial No. 353,064, filed by me on or about January 19, 1907.

In the usual wet method of extracting copper from its ores, the ores, with or without previous roasting are leached with a form of a sulfate. I

According to my improved process, the

solution containing salts of copper is heat d,

'lll an economical manner by the previous wasting of the said ores, as specified in the unproved process which constitutes another division of the application Serial No. 353,064, tiled by me on or about January 19, 1907.

"According to the said process, the neutral or acid solution of copper sulfate 's heated with wood, in a closed vessel, and under -jecting said solution to heat and dissolving the copper, the latter being usually extracted in the pressure; said solution't-hus treated yields metallic copper, and, as product of decomposition of the wood, organic acids and carbondioxid that can be absorbed by putting the apparatus in which the solution is heated under pressure, into communication with a space. filled with some absorbent of carbon dioxid, such as lime; however, the carbon dioxid may escape freely through the valve of the digester.

I have described my referred process, but obviously, changes conl spirit and scope of-my invention.

Having thus described I claim as new and desire to secure by Letters-Patent is: v

\ 1. The herein described process for, obtaining pure copper from a solution containsalts of copper, which consists in subpressure in the presence of a suitable quantity of wood used in any form, such as saw-dust, shavings, waste wood and the like.

2. The herein described process for obtainin pure copper from a solution containing sa ts of copper, which consists in subjecting said solution to heat and pressure, in the presence of a suitable quantity of wood used in any form, such as saw-dust, shavd be made within the ings, waste wood and the like, and in putting the apparatus in which the reduction is efi'ected, in communication with a .space filled with some absorbent of carbon dioxid, such as lime and the like.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

v LUCIEN J UMAU.; 

